We look at the division of 798609 by 51 
Let's see how many times 51 fits into 798609.

On to step 1:
7 divided by 51 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 51

On to step 2:
79 divided by 51 is 1 with a remainder of 28.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 51 from 79 leaves us with 28.
Grab the next digit (8) from the dividend, add it to 28, then carry on: 288 / 51

Step 3:
If we divide 288 by 51, we get 5 and a remainder of 33.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Subtracting 255 from 288 leaves us with 33.
Fetch the next digit (6) from the dividend, attach it to 33 and continue: 336 / 51

Step 4:
The number 51 fits into 336 6 times, leaving a remainder of 30.
Put 6 as the next digit of the answer. 
Result so far: 156.0
Deduct 306 from 336 and we're left with 30.
Include the next digit (0) from the dividend after 30, then repeat: 300 / 51

On to step 5:
When dividing 300 by 51, we get 5 with a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 1565.0
Subtract 255 from 300 to get 45.
Include the next digit (9) from the dividend after 45, then repeat: 459 / 51

Moving on to step 6:
The number 51 fits into 459 9 times, leaving a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 15659.0
Subtract 459 from 459 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 7:
51 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 15659.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
0 divided by 51 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 15659.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 15659.0, and the remainder is 0.0.